Tenan Matthew S, Hackney Anthony C, Griffin Lisa
Department of Kinesiology and Health Education, University of Texas at Austin, Austin, Texas, USA.
US Army Research Laboratory-Human Research and Engineering Directorate, Aberdeen Proving Ground, RDRL-HRS-B, Maryland, USA.
Muscle Nerve. 2016 Apr;53(4):633-40. doi: 10.1002/mus.24897. Epub 2015 Dec 29.
That the vastus medialis oblique (VMO) is a functional unit of the vastus medialis (VM) is disputed. Delayed VMO activation predicts patellofemoral pain, which has higher rates in women.
Single MUs and surface electromyogram (EMG) were collected from the VMO and VM of 9 men and 9 women. Men were tested once; women were tested during 5 menstrual phases. Coherence was assessed for motor unit (MU) firings within and between the VM and VMO using multilevel logistic models to determine statistical significance.
Compared with women, men have 741% (MU pairs) and 256% (MU-EMG pairs) greater odds of common drive (0-5 Hz) coherent oscillations. MU pairs from the VMO and the dual VM/VMO complex have 228% and 212% greater odds of coherent oscillations in the beta band (15-35 Hz) compared with VM pairs.
The VM and VMO are neurologically different muscles; control of the VM complex is sexually dimorphic.
股内侧斜肌（VMO）是否为股内侧肌（VM）的一个功能单位存在争议。VMO激活延迟预示着髌股关节疼痛，女性中该疼痛发生率更高。
采集了9名男性和9名女性的VMO和VM的单个运动单位（MU）及表面肌电图（EMG）。男性测试一次；女性在5个月经周期阶段进行测试。使用多级逻辑模型评估VM和VMO内部及之间运动单位（MU）放电的相干性，以确定统计学显著性。
与女性相比，男性在共同驱动（0 - 5Hz）相干振荡方面，MU对的优势比高741%，MU - EMG对的优势比高256%。与VM对相比，VMO以及VM/VMO双重复合体的MU对在β波段（15 - 35Hz）相干振荡的优势比分别高228%和212%。
VM和VMO在神经学上是不同的肌肉；VM复合体的控制存在性别差异。
